(7+8i)(6+9i)=

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Solution for (7+8i)(6+9i)= equation:


Simplifying
(7 + 8i)(6 + 9i) = 0

Multiply (7 + 8i) * (6 + 9i)
(7(6 + 9i) + 8i * (6 + 9i)) = 0
((6 * 7 + 9i * 7) + 8i * (6 + 9i)) = 0
((42 + 63i) + 8i * (6 + 9i)) = 0
(42 + 63i + (6 * 8i + 9i * 8i)) = 0
(42 + 63i + (48i + 72i2)) = 0

Combine like terms: 63i + 48i = 111i
(42 + 111i + 72i2) = 0

Solving
42 + 111i + 72i2 = 0

Solving for variable 'i'.

Factor out the Greatest Common Factor (GCF), '3'.
3(14 + 37i + 24i2) = 0

Factor a trinomial.
3((7 + 8i)(2 + 3i)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(7 + 8i)' equal to zero and attempt to solve: Simplifying 7 + 8i = 0 Solving 7 + 8i = 0 Move all terms containing i to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 8i = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 8i = 0 + -7 8i = 0 + -7 Combine like terms: 0 + -7 = -7 8i = -7 Divide each side by '8'. i = -0.875 Simplifying i = -0.875

Subproblem 2

Set the factor '(2 + 3i)' equal to zero and attempt to solve: Simplifying 2 + 3i = 0 Solving 2 + 3i = 0 Move all terms containing i to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + 3i = 0 + -2 Combine like terms: 2 + -2 = 0 0 + 3i = 0 + -2 3i = 0 + -2 Combine like terms: 0 + -2 = -2 3i = -2 Divide each side by '3'. i = -0.6666666667 Simplifying i = -0.6666666667

Solution

i = {-0.875, -0.6666666667}

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